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Our Astronomical Column

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Abstract

THE BINARY STAR γ CORONÆ AUSTRALIS.—Professor Schiaparelli has measured this star during the past year with the 8-inch Merz-equatorial of the Observatory of Brera, Milan, where its meridian altitude is less than 8°; an interval of twelve years had elapsed since the last published measures by Powell. The first micrometrical measures were made in 1834 by Sir John Herschel, and from 1847 to 1858 Jacob had given much attention to observations of this star. From the forty-two years' observations thus available, Professor Schiaparelli has calculated an orbit which agrees unusually well with observation, and may be written as follows:—

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